html,
body {
    height: 100%;
}

body {
    padding: 55px 0 55px;
    background-color: #fff;
}

img {
    display: block;
    width: 100%;
}

//   头部
#lt_header {
    position: fixed;
    width: 100%;
    background-color: #006699;
    top: 0;
    left: 0;
    height: 55px;
    // position: relative;
    
    >h1 {
        color: #fff;
        margin-top: 5px;;
    }
    .h_right {
        position: absolute;
        top: 50%;
        right: 20px;
        text-align: center;
        transform: translateY(-50%);
        color: #fff;
        font-size: 20px;
    }
    .h_left {
        position: absolute;
        top: 50%;
        left: 20px;
        text-align: center;
        transform: translateY(-50%);
        color: #fff;
        font-size: 20px;
    }
} 
// 主体
.lt_view{
    height: 100%;
    overflow: hidden;
    position: relative;
}
// 尾部
.lt_footer{
    position: fixed;
    bottom: 0;
    width: 100%;
    left: 0;
    height: 55px;
    background-color: #006699;
    display: flex;
    >a{
        flex: 1;
        text-align: center;
        color: #fff;
        padding-top: 6px;
        .fa{
            font-size: 16px;
        }
        .link_name{
            font-size: 13px;
        }
    }
    .active{
        color: orange;
    }
}